Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Inspection Procedure
- Check POWER, ECU-B And ECU-IG Fuse.
CHECK: continuity of POWER, ECU-B and ECU-IG fuse.
OK: continuity
- NG: Replace the failure fuse.
- OK: Go to step 2 .
- Check Voltage Between Terminals POWER, SIG, BDR, BECU And GND Of Back Door ECU Connector.
PREPARATION: turn ignition switch ON.
CHECK: measure voltage between terminals SIG, and GND.
OK: voltage: 10-14 V.
PREPARATION:
- Turn ignition switch OFF.
- Disconnect the back door ECU connector.
CHECK: measure voltage between terminals BDR, BECU and GND.
OK: voltage: 10-14V.
- OK : Proceed to next circuit inspection shown on problem symptoms table. See PROBLEM SYMPTOMS TABLE .
- NG : Go to step 3.
- Check Wiring Harness And Connector Between ECU And Body Ground.
- NG : Repair or replace wiring harness or connector.
- OK : Check and repair wiring harness and connector between ECU and battery.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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